[Bug 101278] Severe slowdown on Shadow of Mordor between 17.1.0 and 17.1.1
bugzilla-daemon at freedesktop.org
bugzilla-daemon at freedesktop.org
Fri Jun 2 10:32:55 UTC 2017
https://bugs.freedesktop.org/show_bug.cgi?id=101278
Bug ID: 101278
Summary: Severe slowdown on Shadow of Mordor between 17.1.0 and
17.1.1
Product: Mesa
Version: 17.1
Hardware: x86-64 (AMD64)
OS: Linux (All)
Status: NEW
Severity: normal
Priority: medium
Component: Drivers/Gallium/radeonsi
Assignee: dri-devel at lists.freedesktop.org
Reporter: nagrigoriadis at gmail.com
QA Contact: dri-devel at lists.freedesktop.org
Shadow of Mordor slowed down significantly for me on my notebook between Mesa
17.1.0 and 17.1.1
My system:
Gentoo Linux 64-bit
Dell Precision M4700
Intel i7-3720QM quad-core
16 Gig RAM
AMD FirePro M4000 (Cape Verde, 512su, 1GB DDR5 RAM, 675Mhz)
I then did a bisect to find the commit where the slowdown happened (used the
built-in benchmark tool manually, some custom medium-low settings):
35ec26bb00536639b9571f31d8e3f2bcbcfc32fb 30.31fps
ad3b5b7f5f7590fd4359ea3483e2309e4cebc472 18.12fps
So the commit that causes the big slowdown:
https://cgit.freedesktop.org/mesa/mesa/commit/?h=17.1&id=ad3b5b7f5f7590fd4359ea3483e2309e4cebc472
seems to be specific to SI, but appears to fix an issue in tessellation.
I double-checked, and tessellation is off in the game settings, so I'm
surprised this caused a performance difference.
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